Erythnul is the deity of slaughter, and delights in the suffering of others. He encourages his followers to take what they want, shed blood for the inherent fun in it, and to destroy anyone or anything that interferes in their plans. His followers strive to bring ugliness and pain to everyone the world over. Erythnul teaches his followers that those who cannot be destroyed should be maimed, and that that which cannot be gotten should be destroyed, only so that no one else can succeed where they have failed.

Clerics of Erythnul wear rust or blood colored clothing, preferring to color it with actual blood rather than dye. There are no attractive Clerics to Erythnul, as his followers disfigure any who are too attractive to join. Temples to Erythnul are found anywhere much blood has been spilt or a worthy cruelty done, such places even without temples are considered to be holy sites. Temples to Erythnul are squat ugly fortresses, and often house brutal tyrants or criminal lords.

The clergy of Erythnul are gaining in power in the southern cities of Ravannah. They have no formal temples in any of the big cities, but have begun to infiltrate the ruling councils and promote government officials to their own ends. Small shrines are starting to pop up at the sites of skirmishes where people have been killed in the city. No one has claimed responsibility for them, as of yet, but neither has anyone tried to have them removed.